The Government's car-clamping system - targeting people owing fines and victim reparations - appears to be paying off. 

A law change since July allows cars to be clamped until people not paying court fines cough up. 

More than $700,000 has been paid since.

Independent Victims Advocate, Claire Buckley, says about 600 people paid on the spot. 

"I think it's always been known that most of the time, these offenders have been able to pay and were electing not to, because for quite a long time, it was not enforced." 

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